INSTALLATION INSTRUCTIONS Ground Coupled …

1 Bard Manufacturing Company, , Ohio 43506 Since , ahead just as INSTRUCTIONSG round Coupled LoopSystem Design Manual( Ground Source GS System)Manual:2100-099 NSupersedes:2100-099 MFile:Volume I, Tab 1 Date:11-16-07 Manual 2100-099 NPage2 of 66 Bard Manufacturing Company, , Ohio THE STRUCTURE DESIGN HEATING IN BTUH .. LOSS ANDDESIGN COOLING LOAD IN BTUH A Ground SOURCE HEAT OF TYPE Ground LOOP AND MATERIALS TO BE USED .. 4 HEAT PUMP .. 5 PIPE MATERIAL SELECTION .. 5 PRESSURE 6 LOCATION MARKERS.

2 6AS-BUILT PLANS .. 6 SERIES U-BEND .. 6 STIFFENER .. 7 FILL AND PRESSURE 7 MULTIPLE 7 SERVICE LINES .. 7 PARALLEL U-BEND .. 7 SERIES SYSTEM ADVANTAGES .. 10 SERIES SYSTEM DISADVANTAGES .. 10 PARALLEL SYSTEM ADVANTAGES .. 10 PARALLEL SYSTEM DISADVANTAGES .. 10 HORIZONTAL .. 11 NARROW TRENCHES .. 13 BACKHOE 14 TRENCH 14 SERVICE LINES OR HEADERS .. 15 HEADERING 16 PIPE JOINING METHOD .. OF Ground OF THE Ground LOOP HEAT 31 SITE PLAN .. 31 INSTALLATION EQUIPMENT .. 31 PIPE INSTALLATION CONSIDERATIONS.

3 34 Manual 2100-099 NPage3 of CIRCULATION SYSTEM 38 HEAT PUMP CONNECTIONS WITHOUT PUMP KIT .. 39 PIPING 39 PRESSURE DROP CALCULATIONS TO SELECT CIRCULATION PUMP .. 43 STANDARDIZED PARALLEL SYSTEM HEADER DESIGN .. 46 VII. FREEZE 50 CRITERIA FOR ANTIFREEZE .. 50 ADVANTAGES AND DISADVANTAGES OF EACH CIRCULATION FLUID .. 50 THE MOST COMMONLY USED ANTIFREEZE MATERIALS .. 53 NOBURST (PROPYLENE GLYCOL HEATER TRANSFER FLUID) .. 54 Product Description .. 54 Recommended 56 METHYL ALCOHOL (METHANOL) Not Recommended By Bard.

4 56 POTASSIUM ACETATE (GS4 ) .. 56GS4 DESCRIPTION .. 56 Environmental 57 Corrosion Properties .. 57 Handling, Storage, and Disposal .. 57 Adjustments of Fluid Composition .. 57 VIII. SYSTEM START UP .. 59 ADDING 60 PROPER PLANNING YIELDS PROBLEM-FREEGROUND-SOURCE HEAT PUMP SYSTEM .. ITEMS TO BE LOOP SYSTEMS SUSPENDED IN PONDS AND ..LAKES .. 63 LAKE EXCHANGER CONSTRUCTION 63 CALCULATING HEAD LOSS .. 63 PLACEMENT .. 63 SERVICE LINES .. 65 Manual 2100-099 NPage4 of 66 The design of an earth Coupled system is divided up into the following THE STRUCTURE DESIGN HEATING IN BTUHLOSS AND DESIGN COOLING LOAD IN BTUH GAINIt is very important that an accurate load calculation of the structure be done, therefore, it is recommended that Manual J from ACCA or other national accepted methods be A Ground SOURCE HEAT PUMPWhen selecting a Ground source heat pump for use on an earth Coupled system.

5 It may have to operate at entering watertemperatures between 25 F to 100 F, therefore, it is very important that the minimum and maximum entering water tempera-tures of the selected water source be within that range. Several models on the market today have a much smaller operatingrange such as 45 to 85 or 60 to 85 entering water temperature. Some of those will not provide satisfactory operation on anearth Coupled heating or cooling capacity of the Ground source heat pump should be determined from the manufacturer s specificationsfor the design minimum and maximum loop water temperatures.

6 The Ground source heat pump should be sized as follows:HEAT PUMPS SIZED FOR COOLING The output capacity of cooling equipment should not be less than 100% calculatedtotal load nor should it exceed the calculated load by more than 150%. The corresponding latent capacity should not be lessthan the calculated total latent load. The equipment sensible and latent capacities should be determined from themanufacturer s cataloged performance data. Catalog performance should be verified at the design maximum loop watertemperature and indoor design conditions expected on a design PUMPS SIZED FOR HEATING should not be less than 60% nor more than 115% of the calculated total heating performance should be verified at the design minimum loop water temperature and indoor design conditions expectedon a design day.

7 (Auxiliary heat should be sized to make up for any deficiency in output when the heat pump unit isundersized.) Emergency heat may be required in some PUMPS FOR HEATING AND COOLING shall be sized to meet 100% to 150% of the design cooling load dependingon heating size requirements and allowable indoor temperature swings units that meet 60% to 90% of the design heatingload are generally adequate when allowances for internal and solar gains are considered. Auxiliary heat should be sized tomake up for the difference between the design heating load and the heat pump output on a design day.

8 Emergency heat mayalso be required in some locations. Contact Bard Technical Service for application SELECTION OF TYPE Ground LOOP ANDMATERIALS TO BE USEDGROUND LOOP SYSTEMS Earth coupling is a method by which water used by the heat pump is circulated through pipesburied in the Ground . Heat is transferred to and from the soil through the walls of the pipe. Ground loop systems are used inareas where insufficient Ground water is available or where it is impractical to drill a well. The piping may be buried in eithera vertical or a horizontal designing an earth Coupled system, particular attention must be paid to balancing the system between the heat pumpunit and the earth Coupled loop.

9 In a balanced system, the Ground loop will remove all of the heat energy transferred to thewater by the heat pump (cooling cycle) and will provide all of the heat energy to the water that the heat pump unit is capableof absorbing (heating cycle). The net result of a perfectly balanced system is that the change in water temperature through theheat pump is offset by an equal and opposite change in temperature through the earth Coupled loop. For instance, if the heatpump unit in the cooling cycle causes the water temperature to rise 15 F, then the loop must cause a corresponding drop of15 2100-099 NPage5 of 66A word of caution is required here.

10 Although the Ground loop is designed for a balanced rise and fall in water temperaturesuggesting that the net average loop water temperature remains constant because the Ground temperature may vary 15 Ffrom season to season, the loop water temperature may vary 20 F from the balance point temperature. This is because theground is able to overcool the loop water in winter, and may undercool in summer. Because of this, the temperature of thewater entering the Ground source heat pump unit may drop below 30 F in winter or rise above 100 F in summer.